I have a WD My Passport 2 TB, when I copy files from my PC to this hard disk (Windows 7, Seagate 2TB Barracuda HDD) I get speeds of about 100 MBps.
But when I transfer files from the hard disk to my laptop (Ubuntu GNOME 16.04.3, SSD (Laptop Link)), I cap out at 30 MBps. I've tried using the GUI copy as well as rsync.
I'm using USB 3.0 ports on both PC and Laptop.
The external HDD is formatted as NTFS.
What could be the limitation here? These are the exact same files (large video files mostly) which I copied first from PC to HDD, and then from HDD to Laptop.